Missing testing.* UI colour definition result in illegible test coverage results

[dylan-robins]

I just started using the catppuccin theme in vscode, and immediately I noticed a significant difference between this and the jetbrains version of the theme: I can't tell the difference between tested and untested code when using the (new?) visualization provided by vscode!!

Here's what the mocha flavour looks like currently in vscode. I'll only include screenshots of mocha, but the issue is present in all four flavours :

As you can see, very little difference between the lines highlighted in green and those highlighted in red. Now also take into account that I (like 4% of the population) am red/green colourblind... Yeah. Not great. I don't have my access to my works PC with my pycharm license right now to take a screenshot, but I can guarantee that the contrast is a lot better.

Now I found that I can override the UI colours on my side using my settings.json, but IMO the defaults need to be changed to something along these lines because the current colours are just silly.

    "catppuccin.customUIColors": {
        "mocha": {
            "testing.coveredBackground": "green 0.3",
            "testing.coveredGutterBackground": "green 0.3",
            "testing.uncoveredBackground": "red 0.3",
            "testing.uncoveredGutterBackground": "red 0.3"
        },
    }

That results in something much more similar to what I have in pycharm:

BUT, this throws a warning because these keys aren't specified in the json schema. I guess these keys were added in a recent version of vscode and this theme hasn't been updated..? In any case they are documented here: https://code.visualstudio.com/api/references/theme-color#testing-colors

I can open a PR proposing a fix if you want. Let me know what you think! ☕️🐈